scholarly journals Neurophysiological Correlates of the Rubber Hand Illusion in Evoked and Oscillatory Brain Activity

2017 ◽  
Author(s):  
Isa S. Rao ◽  
Christoph Kayser
Keyword(s):  
Stimulus Duration ◽  
Brain Activity ◽  
Body Position ◽  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Stimulus Position ◽  
Rubber Hand ◽  
Experimental Conditions ◽  
Beta Power ◽  
Sensory Processes

AbstractThe rubber hand illusion (RHI) allows insights into how the brain resolves conflicting multisensory information regarding body position and ownership. Previous neuroimaging studies have reported a variety of neurophysiological correlates of illusory hand ownership, with conflicting results likely originating from differences in experimental parameters and control conditions. Here, we overcome these limitations by using a fully automated and precisely-timed visuo-tactile stimulation setup to record evoked responses and oscillatory responses in the human EEG. Importantly, we relied on a combination of experimental conditions to rule out confounds of attention, body-stimulus position and stimulus duration, and on the combination of two control conditions to identify neurophysiological correlates of illusory hand ownership. In two separate experiments we observed a consistent illusion-related attenuation of ERPs around 330 ms over frontocentral electrodes, as well as decreases of frontal alpha and beta power during the illusion that could not be attributed to changes in attention, body-stimulus position or stimulus duration. Our results reveal neural correlates of illusory hand ownership in late and likely higher-order rather than early sensory processes, and support a role of premotor and possibly intraparietal areas in mediating illusory body ownership.

scholarly journals Direct Electrophysiological Correlates of Body Ownership in Human Cerebral Cortex

2018 ◽  
Vol 29 (3) ◽  
pp. 1328-1341 ◽  
Author(s):  
Arvid Guterstam ◽  
Kelly L Collins ◽  
Jeneva A Cronin ◽  
Hugo Zeberg ◽  
Felix Darvas ◽  
...  
Keyword(s):  
Brain Activity ◽  
Effective Connectivity ◽  
Premotor Cortex ◽  
Neuronal Firing ◽  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Rubber Hand ◽  
Functional Roles ◽  
Neuronal Firing Rate ◽  
Electrophysiological Characterization

Abstract Over the past decade, numerous neuroimaging studies based on hemodynamic markers of brain activity have examined the feeling of body ownership using perceptual body-illusions in humans. However, the direct electrophysiological correlates of body ownership at the cortical level remain unexplored. To address this, we studied the rubber hand illusion in 5 patients (3 males and 2 females) implanted with intracranial electrodes measuring cortical surface potentials. Increased high-γ (70–200 Hz) activity, an index of neuronal firing rate, in premotor and intraparietal cortices reflected the feeling of ownership. In both areas, high-γ increases were intimately coupled with the subjective illusion onset and sustained both during and in-between touches. However, intraparietal activity was modulated by tactile stimulation to a higher degree than the premotor cortex through effective connectivity with the hand-somatosensory cortex, which suggests different functional roles. These findings constitute the first intracranial electrophysiological characterization of the rubber hand illusion and extend our understanding of the dynamic mechanisms of body ownership.

scholarly journals Age-related changes in the sense of body ownership: New insights from the rubber hand illusion

PLoS ONE ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. e0207528 ◽  
Author(s):  
Angela Marotta ◽  
Massimiliano Zampini ◽  
Michele Tinazzi ◽  
Mirta Fiorio
Keyword(s):  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Rubber Hand ◽  
Age Related ◽  
Age Related Changes

scholarly journals Multisensory integration underlying body-ownership experiences in schizophrenia and offspring of patients: a study using the rubber hand illusion paradigm

2019 ◽  
Vol 44 (3) ◽  
pp. 177-184 ◽  
Author(s):  
Merel Prikken ◽  
Anouk van der Weiden ◽  
Heleen Baalbergen ◽  
Manon H.J. Hillegers ◽  
René S. Kahn ◽  
...  
Keyword(s):  
Multisensory Integration ◽  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Rubber Hand

scholarly journals Interoceptive ingredients of body ownership: Affective touch and cardiac awareness in the rubber hand illusion

Cortex ◽  
2018 ◽  
Vol 104 ◽  
pp. 180-192 ◽  
Author(s):  
Laura Crucianelli ◽  
Charlotte Krahé ◽  
Paul M. Jenkinson ◽  
Aikaterini (Katerina) Fotopoulou
Keyword(s):  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Rubber Hand ◽  
Affective Touch ◽  
Cardiac Awareness

Hand ownership and hand position in the rubber hand illusion are uncorrelated

2012 ◽  
Vol 25 (0) ◽  
pp. 52 ◽  
Author(s):  
Nicholas P. Holmes ◽  
Tamar R. Makin ◽  
Michelle Cadieux ◽  
Claire Williams ◽  
Katherine R. Naish ◽  
...  
Keyword(s):  
Objective Measure ◽  
Rubber Hand Illusion ◽  
Hand Position ◽  
Body Ownership ◽  
Verbal Reports ◽  
Rubber Hand ◽  
Manual Pointing ◽  
Staircase Procedure ◽  
Two Measures

The rubber hand illusion (RHI) is a multisensory (visual, tactile, proprioceptive) illusion in which participants report body ownership over, mislocalize actual hand position to, and feel touches applied to, the rubber hand. For many years, researchers have used changes in perceived hand position, measured by inter-manual pointing, as a more objective measure of the illusion than verbal reports alone. Despite this reliance, there is little evidence to show that the illusion of hand ownership is directly related to perceived hand position. We developed an adaptive staircase procedure to measure perceived hand position, and tested whether the RHI affected perceived hand position. In two experiments we found a significant illusion of ownership, as well as significant changes in perceived hand position, but these two measures were uncorrelated. In a third experiment using more typical RHI procedures, we again replicated significant illusions of ownership and changes in hand position, but again the measures were uncorrelated. We conclude that viewing and feeling touches applied to a dummy hand results in clear illusions of ownership and changes in hand position, but via independent mechanisms.

The Rubber Hand Illusion in Healthy Younger and Older Adults

2018 ◽  
Vol 31 (6) ◽  
pp. 537-555 ◽  
Author(s):  
Jennifer L. Campos ◽  
Graziella El-Khechen Richandi ◽  
Babak Taati ◽  
Behrang Keshavarz
Keyword(s):  
Skin Temperature ◽  
Subjective Experience ◽  
Age Groups ◽  
Objective Measure ◽  
The Body ◽  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Rubber Hand ◽  
Age Related ◽  
Body Change

Percepts about our body’s position in space and about body ownership are informed by multisensory feedback from visual, proprioceptive, and tactile inputs. The Rubber Hand Illusion (RHI) is a multisensory illusion that is induced when an observer sees a rubber hand being stroked while they feel their own, spatially displaced, and obstructed hand being stroked. When temporally synchronous, the visual–tactile interactions can create the illusion that the rubber hand belongs to the observer and that the observer’s real hand is shifted in position towards the rubber hand. Importantly, little is understood about whether these multisensory perceptions of the body change with older age. Thus, in this study we implemented a classic RHI protocol (synchronous versus asynchronous stroking) with healthy younger (18–35) and older (65+) adults and measured the magnitude of proprioceptive drift and the subjective experience of body ownership. As an adjunctive objective measure, skin temperature was recorded to evaluate whether decreases in skin temperature were associated with illusory percepts, as has been shown previously. The RHI was observed for both age groups with respect to increased drift and higher ratings of ownership following synchronous compared to asynchronous stroking. Importantly, no effects of age and no interactions between age and condition were observed for either of these outcome measures. No effects were observed for skin temperature. Overall, these results contribute to an emerging field of research investigating the conditions under which age-related differences in multisensory integration are observed by providing insights into the role of visual, proprioceptive, and tactile inputs on bodily percepts.

The Development of a Cross-Modal Sense of Body Ownership

2017 ◽  
Vol 28 (3) ◽  
pp. 330-337 ◽  
Author(s):  
Elena Nava ◽  
Nadia Bolognini ◽  
Chiara Turati
Keyword(s):  
Sense Of Self ◽  
Age Groups ◽  
Rubber Hand Illusion ◽  
Hand Position ◽  
Body Ownership ◽  
Rubber Hand ◽  
Pointing Task

In this study, we investigated the contribution of tactile and proprioceptive cues to the development of the sense of body ownership by testing the susceptibility of 4- to 5-year-old children, 8- to 9-year-old children, and adults to the somatic rubber-hand illusion (SRHI). We found that feelings of owning a rubber hand in the SHRI paradigm, as assessed by explicit reports (i.e., questionnaire), are already present by age 4 and do not change throughout development. In contrast, the effect of the illusion on the sense of hand position, as assessed by a pointing task, was present only in 8- to 9-year-old children and adults; the magnitude of such capture increased with age. Our findings reveal that tactile-proprioceptive interactions contributed differently to the two aspects characterizing the SRHI: Although the contribution of such interactions to an explicit sense of self was similar across age groups, their contribution to the more implicit recalibration of hand position is still developing by age 9.

scholarly journals The Emotional Glue of the Senses: Affective Certainty and Congruency in the Rubber Hand Illusion

2018 ◽  
Author(s):  
Maria Laura Filippetti ◽  
Louise P. Kirsch ◽  
Laura Crucianelli ◽  
Aikaterini Fotopoulou
Keyword(s):  
Multisensory Integration ◽  
Sensory Stimulation ◽  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Top Down ◽  
Rubber Hand ◽  
Spatial Properties ◽  
Affective Quality ◽  
Temporal And Spatial

AbstractOur sense of body ownership relies on integrating different sensations according to their temporal and spatial congruency. Nevertheless, there is ongoing controversy about the role of affective congruency during multisensory integration, i.e. whether the stimuli to be perceived by the different sensory channels are congruent or incongruent in terms of their affective quality. In the present study, we applied a widely used multisensory integration paradigm, the Rubber Hand Illusion, to investigate the role of affective, top-down aspects of sensory congruency between visual and tactile modalities in the sense of body ownership. In Experiment 1 (N = 36), we touched participants with either soft or rough fabrics in their unseen hand, while they watched a rubber hand been touched synchronously with the same fabric or with a ‘hidden’ fabric of ‘uncertain roughness’. In Experiment 2 (N = 50), we used the same paradigm as in Experiment 1, but replaced the ‘uncertainty’ condition with an ‘incongruent’ one, in which participants saw the rubber hand being touched with a fabric of incongruent roughness and hence opposite valence. We found that certainty (Experiment 1) and congruency (Experiment 2) between the felt and vicariously perceived tactile affectivity led to higher subjective embodiment compared to uncertainty and incongruency, respectively, irrespective of any valence effect. Our results suggest that congruency in the affective top-down aspects of sensory stimulation is important to the multisensory integration process leading to embodiment, over and above temporal and spatial properties.

scholarly journals The supernumerary rubber hand illusion revisited: perceived duplication of limbs and visuotactile events

2020 ◽  
Author(s):  
Chenggui Fan ◽  
H. Henrik Ehrsson
Keyword(s):  
Cognitive Neuroscience ◽  
Body Representation ◽  
Rubber Hand Illusion ◽  
Body Ownership ◽  
Rubber Hand ◽  
Real Right ◽  
The Real ◽  
Skin Conductance Responses ◽  
Supernumerary Limbs ◽  
Real Hand

A controversial and unresolved issue in cognitive neuroscience is whether humans can experience supernumerary limbs as part of their own body. Some previous experiments have claimed that it is possible to elicit supernumerary hand illusions based on modified versions of the rubber hand illusion. However, other studies have provided conflicting results that suggest that only one rubber hand can be perceived as one’s own. To address this issue, we developed a supernumerary hand illusion paradigm that allowed us to disambiguate ownership of individual rubber hands from simultaneous ownership of two fake hands. In our setup, the participant’s real right hand was hidden under a platform, while two identical right rubber hands were placed in parallel on top of the platform in direct view of the participant. We applied synchronous strokes to both rubber hands and the real hand (SS), synchronous strokes to one rubber hand and the real hand and asynchronous strokes to the other model hand (AS and SA) or asynchronous strokes to both fake hands in relation to the real hand (AA). Our results demonstrate that a genuine illusion of owning two rubber hands can be elicited and that such a supernumerary hand illusion can be isolated from the sense of ownership of a single rubber hand both in terms of questionnaire ratings and threat-evoked skin conductance responses (SCRs). These findings advance our knowledge about the dynamic flexibility and fundamental constraints of body representation and emphasize the importance of correlated afferent signals for causal inference in body ownership.

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